The invention relates to an ending dual-selection low carbon environmental protection float charger and belongs to the electronic technology field. The ending dual-selection low carbon environmental protection float charger comprises a process indication unit, a P-type charging unit, an interface unit, a pulse unit, a dual-selection ending unit, a discharging unit, a load unit and a trickle resistor, wherein the P-type charging unit is in a constant current mode, after the P-type charging unit is matched with the pulse unit and the interface unit, pulse type constant current charging is realized. According to the ending dual-selection low carbon environmental protection float charger, two ending modes are included, one ending mode is utilized after a cell is fully charged, the other endingmode is utilized after timed counting is in place, the two modes can be flexibly switched and are convenient, after ending, the needed trickle current is provided by the trickle resistor for a charged cell, after enforcement, the charging and charging stop time of a charged power source can be flexibly adjusted, adaptation to different types of charged cells is realized, charging ending selectionmodes are added, for first-time charging cells, the timed ending mode is added, the time is accurate, setting the prompting time is not needed, the circuit is simple, production debugging is easy, and the float charger is suitable for micro enterprise production.